the seizing of the objects containing computer data, traffic data or data regarding the users, from the person or service provider possessing them, in view of making copies that can serve as evidence. 2. If the objects containing computer data referring to the data for the legal bodies in order to make copies, the prosecutor mentioned in paragraph (1) or court orders the forced seizure. During the trial, the forced seizure order is communicated to the prosecutor, who takes measures to fulfil it, through the criminal investigation body. 3. The copies mentioned in paragraph (1) are achieved by the technical means and the proper procedures to provide the integrity of the information contained by them. Article 19: Searching and Seizing Computer Data 1. Whenever for the purpose of discovering or gathering evidence it is necessary to investigate a computer system or a computer data storage medium, the prosecutor or court can order a search.   2. If the criminal investigation body or the court considers that seizing the objects that contain the data referred to at paragraph (1) would severely affect the activities performed by the persons possessing these objects, it can order performing copies that would serve as evidence and that are achieved according to art. 18, paragraph (3).   3. When, on the occasion of investigating a computer system or a computer data storage medium it is found out that the computer data searched for are included on another computer system or another computer data storage medium and are accessible from the initial system or medium, it can be ordered immediately to authorize performing the search in order to investigate all the computer systems or computer data storage medium searched for.             Article 20: Condition and Safeguard 1. The access to a computer system, as well as the interception or recording of communications carried out by means of computer systems are performed when useful to find the truth and the facts or identification of the doers cannot be achieved on the basis of other evidence. 2. The measures referred to at paragraph (1) are performed by motivated authorisation of the prosecutor specially assigned by the general prosecutor related to the Court of Appeal or, as appropriate, of the general prosecutor of the office related to the Supreme Court, and for the corruption offences, of the general prosecutor of the National Anti-Corruption Office, by the criminal investigation bodies with the help of specialised persons, who are obliged to keep the confidentiality of the operation performed. 3. The authorisation referred to at paragraph (2) is given for 30 days at the most, with the extension possibility under the same conditions, for duly justified reasons, each extension not exceeding 30 days. The maximum duration of these measures is 4 10